<s>
The	O
player	O
moves	O
the	O
avatar	B-Application
through	O
a	O
2D	O
screen	O
that	O
changes	O
based	O
on	O
the	O
player	O
's	O
camera	O
angle	O
in	O
3D	O
space	O
.	O
</s>
<s>
When	O
the	O
player	O
takes	O
control	O
of	O
the	O
camera	O
angle	O
,	O
the	O
2D	O
avatar	B-Application
is	O
locked	O
in	O
place	O
until	O
the	O
player	O
decides	O
to	O
return	O
to	O
2D	O
mode	O
.	O
</s>
<s>
The	O
player	O
's	O
goal	O
is	O
to	O
move	O
an	O
avatar	B-Application
to	O
a	O
goal	O
.	O
</s>
<s>
The	O
game	O
is	O
played	O
by	O
switching	O
between	O
2D	O
and	O
3D	O
modes	O
:	O
in	O
2D	O
mode	O
,	O
the	O
avatar	B-Application
can	O
move	O
but	O
the	O
field	O
of	O
view	O
is	O
fixed	O
.	O
</s>
<s>
In	O
3D	O
mode	O
,	O
the	O
player	O
can	O
move	O
and	O
change	O
the	O
field	O
of	O
view	O
but	O
the	O
avatar	B-Application
is	O
fixed	O
in	O
3D	O
space	O
.	O
</s>
<s>
The	O
avatar	B-Application
can	O
walk	O
on	O
the	O
blue	O
platforms	O
in	O
2D	O
mode	O
and	O
is	O
unable	O
to	O
pass	O
through	O
them	O
.	O
</s>
<s>
If	O
the	O
avatar	B-Application
touches	O
an	O
orange	O
platform	O
,	O
it	O
goes	O
back	O
to	O
where	O
it	O
was	O
before	O
it	O
entered	O
2D	O
mode	O
.	O
</s>
<s>
No	O
matter	O
where	O
the	O
player	O
is	O
,	O
the	O
avatar	B-Application
always	O
stays	O
the	O
same	O
size	O
in	O
relation	O
to	O
the	O
screen	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
the	O
player	O
is	O
able	O
to	O
fit	O
the	O
avatar	B-Application
through	O
spaces	O
that	O
appear	O
to	O
be	O
impossible	O
at	O
first	O
sight	O
.	O
</s>
<s>
Perspective	O
was	O
made	O
available	O
for	O
download	O
for	B-License
free	I-License
on	O
December	O
12	O
,	O
2012	O
.	O
</s>
<s>
The	O
game	O
was	O
heavily	O
inspired	O
by	O
Portal	B-Application
and	O
borrows	O
the	O
tagline	O
"	O
Can	O
you	O
think	O
with	O
perspective	O
?	O
"	O
</s>
<s>
Other	O
inspiration	O
for	O
level	O
design	O
came	O
from	O
Braid	B-Application
.	O
</s>
